I have to disagree!
Wait... Uh... What?
This is not specifically related to hardcore but an idea that came to me that would be cool to see in game is faster gem leveling. For example the percentage should scale above 100% so that you might get more than one level. That way if you complete a rift level 60 and pick a level 1 gem you might get 2 or 3 levels instead of just 1
Quote from mikeofthedesert
Losing a HC character because of disconnection is something that really gives you..
Nothing, not a single good gaming emotion.
It's the same feeling you got at least once, overwriting a 200+ hours savegame on console when you was a kid. It's pure shame, nothing gained.. Nothing learnt.. Because it's not your fault this time. You can't imagine how FRUSTRATING it is until it really happens to you personally.
..HC's existence is insulted by this happening. I am sad as a gamer.. Frustration will soon become sadness, I know this by experience.